From Phoronix:

Last week we mentioned that X3: Reunion for Linux was going forward with beta testing, which is going on ten months after Linux Game Publishing originally announced they would be porting this X2 - The Threat sequel. Well, those fortunate to have closed-beta access privileges at Linux Game Publishing were finally greeted with the X3: Reunion Linux binary yesterday. In addition to the Linux binary, there is also support for DragonflyBSD, FreeBSD, NetBSD, and OpenBSD. X3: Reunion was originally supposed to ship for Linux back in August, but seeing as the closed beta testing hadn't even started until yesterday, don't expect the final release until the first half of 2008.

Read more at Phoronix